How to read a CSV file into a NET Datatable

Question

How can I load a CSV file into a System Data DataTable  creating the datatable based on the CSV file   Does the regular ADO net functionality allow this

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Here s a solution that uses ADO Net s ODBC text driver   Dim csvFileFolder As String    C  YourFileFolder  Dim csvFileName As String    YourFile csv    Note that the folder is specified in the connection string   not the file  That s specified in the SELECT query  later  Dim connString As String    Driver  Microsoft Text Driver    txt    csv   Dbq          amp  csvFileFolder  amp    Extended Properties   Text HDR No FMT Delimited    Dim conn As New Odbc OdbcConnection connString    Open a data adapter  specifying the file name to load Dim da As New Odbc OdbcDataAdapter  SELECT   FROM     amp  csvFileName  amp       conn   Then fill a data table  which can be bound to a grid Dim dt As New DataTableda Fill dt   grdCSVData DataSource   dt   Once filled  you can value properties of the datatable  like ColumnName  to make utilize all the powers of the ADO Net data objects   In VS2008 you can use Linq to achieve the same effect   NOTE  This may be a duplicate of this SO question

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With Cinchoo ETL - an open source library  you can easily convert CSV file to DataTable with few lines of code   using  var p   new ChoCSVReader    YOUR CSV FILE           WithFirstLineHeader               var dt   p AsDataTable        For more information  please visit codeproject article   Hope it helps

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I ve recently written a CSV parser for  NET that I m claiming is currently the fastest available as a nuget package  Sylvan Data Csv  Using this library to load a DataTable is extremely easy  using var dr   CsvDataReader Create  quot data csv quot    var dt   new DataTable    dt Load dr     Assuming your file is a standard comma separated files with headers  that s all you need  There are also options to allow reading files without headers  and using alternate delimiters etc  It is also possible to provide a custom schema for the CSV file so that columns can be treated as something other than string values  This will allow the DataTable columns to be loaded with values that can be easier to work with  as you won t have to coerce them when you access them  This can be accomplished by providing an ICsvSchemaProvider implementation  which exposes a single method DbColumn  GetColumn string  name  int ordinal   The DbColumn type is an abstract type defined in System Data Common  which means that you would have to provide an implementation of that too if you implement your own schema provider  The DbColumn type exposes a variety of metadata about a column  and you can choose to expose as much of the metadata as needed  The most important metadata is the DataType and AllowDBNull  A very simple implementation that would expose type information could look like the following  class TypedCsvColumn   DbColumn       public TypedCsvColumn Type type  bool allowNull                   if you assign ColumnName here  it will override whatever is in the csv header         this DataType   type          this AllowDBNull   allowNull               class TypedCsvSchema   ICsvSchemaProvider       List lt TypedCsvColumn gt  columns       public TypedCsvSchema                 this columns   new List lt TypedCsvColumn gt                public TypedCsvSchema Add Type type  bool allowNull   false                this columns Add new TypedCsvColumn type  allowNull            return this             DbColumn  ICsvSchemaProvider GetColumn string  name  int ordinal                return ordinal  lt  columns Count   columns ordinal    null           To consume this implementation you would do the following   var schema   new TypedCsvSchema        Add typeof int        Add typeof string        Add typeof double   true       Add typeof DateTime        Add typeof DateTime   true   var options   new CsvDataReaderOptions       Schema   schema      using var dr   CsvDataReader Create  quot data csv quot   options

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Here s an excellent class that will copy CSV data into a datatable using the structure of the data to create the DataTable  A portable and efficient generic parser for flat files It s easy to configure and easy to use   I urge you to take a look

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Very basic answer  if you don t have a complex csv that can use a simple split function this will work well for importing  note this imports as strings  i do datatype conversions later if i need to           private DataTable csvToDataTable string fileName  char splitCharacter                                StreamReader sr   new StreamReader fileName           string myStringRow   sr ReadLine            var rows   myStringRow Split splitCharacter           DataTable CsvData   new DataTable            foreach  string column in rows                          creates the columns of new datatable based on first row of csv             CsvData Columns Add column                     myStringRow   sr ReadLine            while  myStringRow    null                          runs until string reader returns null and adds rows to dt              rows   myStringRow Split splitCharacter               CsvData Rows Add rows               myStringRow   sr ReadLine                      sr Close            sr Dispose            return CsvData          My method if I am importing a table with a string   separater and handles the issue where the current line i am reading may have went to the next line in the csv or text file  lt - IN which case i want to loop until I get to the total number of lines in the first row  columns   public static DataTable ImportCSV string fullPath  string   sepString                DataTable dt   new DataTable            using  StreamReader sr   new StreamReader fullPath                          stream uses using statement because it implements iDisposable             string firstLine   sr ReadLine                var headers   firstLine Split sepString  StringSplitOptions None               foreach  var header in headers                                 create column headers                 dt Columns Add header                             int columnInterval   headers Count                string newLine   sr ReadLine                while  newLine    null                                  loop adds each row to the datatable                 var fields   newLine Split sepString  StringSplitOptions None      csv delimiter                     var currentLength   fields Count                    if  currentLength  lt  columnInterval                                        while  currentLength  lt  columnInterval                                                 if the count of items in the row is less than the column row go to next line until count matches column number total                         newLine    sr ReadLine                            currentLength   newLine Split sepString  StringSplitOptions None  Count                                              fields   newLine Split sepString  StringSplitOptions None                                     if  currentLength  gt  columnInterval                                            ideally never executes - but if csv row has too many separators  line is skipped                     newLine   sr ReadLine                        continue                                    dt Rows Add fields                   newLine   sr ReadLine                              sr Close                       return dt

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I have decided to use Sebastien Lorion s Csv Reader  Jay Riggs suggestion is a great solution also  but I just didn t need all of the features that that Andrew Rissing s Generic Parser  provides  UPDATE 10 25 2010 After using Sebastien Lorion s Csv Reader in my project for nearly a year and a half  I have found that it throws exceptions when parsing some csv files that I believe to be well formed  So  I did switch to Andrew Rissing s Generic Parser  and it seems to be doing much better  UPDATE 9 22 2014 These days  I mostly use this extension method to read delimited text  https   github com Core-Techs Common blob master CoreTechs Common Text DelimitedTextExtensions cs L22 https   www nuget org packages CoreTechs Common  UPDATE 2 20 2015 Example  var csv     quot Name  Age Ronnie  30 Mark  40 Ace  50 quot    TextReader reader   new StringReader csv   var table   new DataTable    using var it   reader ReadCsvWithHeader   GetEnumerator           if   it MoveNext    return       foreach  var k in it Current Keys          table Columns Add k        do               var row   table NewRow            foreach  var k in it Current Keys              row k    it Current k                table Rows Add row              while  it MoveNext

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Modified from Mr ChuckBevitt  Working solution   string CSVFilePathName   APP PATH    Facilities csv   string   Lines   File ReadAllLines CSVFilePathName   string   Fields  Fields   Lines 0  Split new char             int Cols   Fields GetLength 0   DataTable dt   new DataTable      1st row must be column names  force lower case to ensure matching later on  for  int i   0  i  lt  Cols-1  i            dt Columns Add Fields i  ToLower    typeof string    DataRow Row  for  int i   0  i  lt  Lines GetLength 0 -1  i              Fields   Lines i  Split new char                     Row   dt NewRow            for  int f   0  f  lt  Cols-1  f                    Row f    Fields f           dt Rows Add Row

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The best option I have found  and it resolves issues where you may have different versions of Office installed  and also 32 64-bit issues like Chuck Bevitt mentioned  is FileHelpers   It can be added to your project references using NuGet and it provides a one-liner solution   CommonEngine CsvToDataTable path   ImportRecord        true

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this is the code i use it but your apps must run with net version 3 5  private void txtRead Click object sender  EventArgs e                          var filename     d  shiptest txt                openFileDialog1 InitialDirectory    d                  openFileDialog1 Filter    txt files    txt    txt All files                         DialogResult result   openFileDialog1 ShowDialog                if  result    DialogResult OK                                if  openFileDialog1 FileName                                              var reader   ReadAsLines openFileDialog1 FileName                        var data   new DataTable                           this assume the first record is filled with the column names                     var headers   reader First   Split                           foreach  var header in headers                                                data Columns Add header                                              var records   reader Skip 1                       foreach  var record in records                                                data Rows Add record Split                                                   dgList DataSource   data                                                     static IEnumerable lt string gt  ReadAsLines string filename                        using  StreamReader reader   new StreamReader filename                   while   reader EndOfStream                      yield return reader ReadLine

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I use a library called ExcelDataReader  you can find it on NuGet   Be sure to install both ExcelDataReader and the ExcelDataReader DataSet extension  the latter provides the required AsDataSet method referenced below    I encapsulated everything in one function  you can copy it in your code directly   Give it a path to CSV file  it gets you a dataset  with one table   public static DataSet GetDataSet string filepath       var stream   File OpenRead filepath       try             var reader   ExcelReaderFactory CreateCsvReader stream  new ExcelReaderConfiguration                       LeaveOpen   false                    var result   reader AsDataSet new ExcelDataSetConfiguration                          Gets or sets a value indicating whether to set the DataColumn DataType                property in a second pass             UseColumnDataType   true                 Gets or sets a callback to determine whether to include the current sheet               in the DataSet  Called once per sheet before ConfigureDataTable             FilterSheet    tableReader  sheetIndex    gt  true                 Gets or sets a callback to obtain configuration options for a DataTable              ConfigureDataTable    tableReader    gt  new ExcelDataTableConfiguration                                  Gets or sets a value indicating the prefix of generated column names                 EmptyColumnNamePrefix    Column                      Gets or sets a value indicating whether to use a row from the                    data as column names                 UseHeaderRow   true                     Gets or sets a callback to determine which row is the header row                     Only called when UseHeaderRow   true                 ReadHeaderRow    rowReader    gt                                         F ex skip the first row and use the 2nd row as column headers                       rowReader Read                                         Gets or sets a callback to determine whether to include the                    current row in the DataTable                 FilterRow    rowReader    gt                                      return true                                       Gets or sets a callback to determine whether to include the specific                   column in the DataTable  Called once per column after reading the                    headers                 FilterColumn    rowReader  columnIndex    gt                                      return true                                                   return result          catch  Exception ex              return null          finally             stream Close           stream Dispose

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You can achieve it by using Microsoft VisualBasic FileIO TextFieldParser dll in C   static void Main                         string csv file path   C  Users Administrator Desktop test csv                DataTable csvData   GetDataTabletFromCSVFile csv file path                Console WriteLine  Rows count     csvData Rows Count                Console ReadLine                private static DataTable GetDataTabletFromCSVFile string csv file path                        DataTable csvData   new DataTable                 try                            using TextFieldParser csvReader   new TextFieldParser csv file path                                         csvReader SetDelimiters new string                                 csvReader HasFieldsEnclosedInQuotes   true                      string   colFields   csvReader ReadFields                        foreach  string column in colFields                                                DataColumn datecolumn   new DataColumn column                           datecolumn AllowDBNull   true                          csvData Columns Add datecolumn                                              while   csvReader EndOfData                                                string   fieldData   csvReader ReadFields                              Making empty value as null                         for  int i   0  i  lt  fieldData Length  i                                                          if  fieldData i                                                                       fieldData i    null                                                                                  csvData Rows Add fieldData                                                                     catch  Exception ex                                          return csvData

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Hey its working 100      public static DataTable ConvertCSVtoDataTable string strFilePath          DataTable dt   new DataTable        using  StreamReader sr   new StreamReader strFilePath                 string   headers   sr ReadLine   Split               foreach  string header in headers                        dt Columns Add header                     while   sr EndOfStream                        string   rows   sr ReadLine   Split                   DataRow dr   dt NewRow                for  int i   0  i  lt  headers Length  i                                  dr i    rows i                             dt Rows Add dr                          return dt         CSV Image   Data table Imported

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We always used to use the Jet OLEDB driver  until we started going to 64 bit applications  Microsoft has not and will not release a 64 bit Jet driver  Here s a simple solution we came up with that uses File ReadAllLines and String Split to read and parse the CSV file and manually load a DataTable  As noted above  it DOES NOT handle the situation where one of the column values contains a comma  We use this mostly for reading custom configuration files - the nice part about using CSV files is that we can edit them in Excel   string CSVFilePathName     C  test csv   string   Lines   File ReadAllLines CSVFilePathName   string   Fields  Fields   Lines 0  Split new char             int Cols   Fields GetLength 0   DataTable dt   new DataTable      1st row must be column names  force lower case to ensure matching later on  for  int i   0  i  lt  Cols  i        dt Columns Add Fields i  ToLower    typeof string    DataRow Row  for  int i   1  i  lt  Lines GetLength 0   i          Fields   Lines i  Split new char                 Row   dt NewRow        for  int f   0  f  lt  Cols  f            Row f    Fields f       dt Rows Add Row

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Use this  one function solve all problems of comma and quote   public static DataTable CsvToDataTable string strFilePath                 if  File Exists strFilePath                          string   Lines              string CSVFilePathName   strFilePath               Lines   File ReadAllLines CSVFilePathName               while  Lines 0  EndsWith                                     Lines 0    Lines 0  Remove Lines 0  Length - 1                             string   Fields              Fields   Lines 0  Split new char                         int Cols   Fields GetLength 0               DataTable dt   new DataTable                  1st row must be column names  force lower case to ensure matching later on              for  int i   0  i  lt  Cols  i                    dt Columns Add Fields i   typeof string                DataRow Row              int rowcount   0              try                               string   ToBeContinued   new string                      bool lineToBeContinued   false                  for  int i   1  i  lt  Lines GetLength 0   i                                          if   Lines i  Equals                                                    Fields   Lines i  Split new char                                     string temp0   string Join     Fields  Replace                                      int quaotCount0   temp0 Count c   gt  c                                  if  Fields GetLength 0   lt  Cols    lineToBeContinued    quaotCount0   2    0                                                        if  ToBeContinued GetLength 0   gt  0                                                                ToBeContinued ToBeContinued Length - 1       n    Fields 0                                   Fields   Fields Skip 1  ToArray                                                              string   newArray   new string ToBeContinued Length   Fields Length                               Array Copy ToBeContinued  newArray  ToBeContinued Length                               Array Copy Fields  0  newArray  ToBeContinued Length  Fields Length                               ToBeContinued   newArray                              string temp   string Join     ToBeContinued  Replace                                          int quaotCount   temp Count c   gt  c                                      if  ToBeContinued GetLength 0   gt   Cols  amp  amp  quaotCount   2    0                                                                 Fields   ToBeContinued                                  ToBeContinued   new string                                        lineToBeContinued   false                                                            else                                                               lineToBeContinued   true                                  continue                                                                                     modified by Teemo  2016 09 13                           handle     and                               Deserialize CSV following Excel s rule                             1  If there is commas in a field  quote the field                             2  Two consecutive quotes indicate a user s quote                           List lt int gt  singleLeftquota   new List lt int gt                             List lt int gt  singleRightquota   new List lt int gt                                combine fileds if number of commas match                         if  Fields GetLength 0   gt  Cols                                                         bool lastSingleQuoteIsLeft   true                              for  int j   0  j  lt  Fields GetLength 0   j                                                                  bool leftOddquota   false                                  bool rightOddquota   false                                  if  Fields j  StartsWith                                                                               int numberOfConsecutiveQuotes   0                                      foreach  char c in Fields j     start with how many                                                                                 if  c                                                                                               numberOfConsecutiveQuotes                                                                                      else                                                                                       break                                                                                                                      if  numberOfConsecutiveQuotes   2    1   start with odd number of quotes indicate system quote                                                                               leftOddquota   true                                                                                                           if  Fields j  EndsWith                                                                              int numberOfConsecutiveQuotes   0                                      for  int jj   Fields j  Length - 1  jj  gt   0  jj--                                                                                if  Fields j  Substring jj 1              end with how many                                                                                         numberOfConsecutiveQuotes                                                                                      else                                                                                       break                                                                                                                       if  numberOfConsecutiveQuotes   2    1   end with odd number of quotes indicate system quote                                                                               rightOddquota   true                                                                                                          if  leftOddquota  amp  amp   rightOddquota                                                                        singleLeftquota Add j                                       lastSingleQuoteIsLeft   true                                                                    else if   leftOddquota  amp  amp  rightOddquota                                                                        singleRightquota Add j                                       lastSingleQuoteIsLeft   false                                                                    else if  Fields j             only one quota in a field                                                                       if  lastSingleQuoteIsLeft                                                                                singleRightquota Add j                                                                             else                                                                               singleLeftquota Add j                                                                                                                                     if  singleLeftquota Count    singleRightquota Count                                                                int insideCommas   0                                  for  int indexN   0  indexN  lt  singleLeftquota Count  indexN                                                                          insideCommas    singleRightquota indexN  - singleLeftquota indexN                                                                     if  Fields GetLength 0  - Cols  gt   insideCommas    probabaly matched                                                                       int validFildsCount   insideCommas   Cols     Fields GetLength 0  - insideCommas  may be exceed the Cols                                     String   temp   new String validFildsCount                                       int totalOffSet   0                                      for  int iii   0  iii  lt  validFildsCount - totalOffSet  iii                                                                                  bool combine   false                                          int storedIndex   0                                          for  int iInLeft   0  iInLeft  lt  singleLeftquota Count  iInLeft                                                                                          if  iii   totalOffSet    singleLeftquota iInLeft                                                                                                 combine   true                                                  storedIndex   iInLeft                                                  break                                                                                                                                  if  combine                                                                                        int offset   singleRightquota storedIndex  - singleLeftquota storedIndex                                               for  int combineI   0  combineI  lt   offset  combineI                                                                                                  temp iii     Fields iii   totalOffSet   combineI                                                                                                   temp iii    temp iii  Remove temp iii  Length - 1  1                                               totalOffSet    offset                                                                                    else                                                                                       temp iii    Fields iii   totalOffSet                                                                                                                       Fields   temp                                                                                                                    Row   dt NewRow                            for  int f   0  f  lt  Cols  f                                                          Fields f    Fields f  Replace                  Two consecutive quotes indicate a user s quote                             if  Fields f  StartsWith                                                                      if  Fields f  EndsWith                                                                              Fields f    Fields f  Remove 0  1                                       if  Fields f  Length  gt  0                                                                                Fields f    Fields f  Remove Fields f  Length - 1  1                                                                                                                                     Row f    Fields f                                                     dt Rows Add Row                           rowcount                                                                      catch  Exception ex                                throw new Exception   row       rowcount 2           ex Message                               OleDbConnection connection   new OleDbConnection string Format   Provider Microsoft Jet OLEDB 4 0 Data Source  0   Extended Properties   text HDR Yes FMT Delimited      FilePath   FileName                  OleDbCommand command   new OleDbCommand  SELECT   FROM     FileName  connection                 OleDbDataAdapter adapter   new OleDbDataAdapter command                 DataTable dt   new DataTable                  adapter Fill dt                 adapter Dispose                return dt                    else             return null             OleDbConnection connection   new OleDbConnection string Format   Provider Microsoft Jet OLEDB 4 0 Data Source  0   Extended Properties   text HDR Yes FMT Delimited      strFilePath              OleDbCommand command   new OleDbCommand  SELECT   FROM     strFileName  connection             OleDbDataAdapter adapter   new OleDbDataAdapter command             DataTable dt   new DataTable              adapter Fill dt             return dt

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Can t resist adding my own spin to this  This is so much better and more compact than what I ve used in the past   This solution    Does not depend on a database driver or 3rd party library   Will not fail on duplicate column names Handles commas in the data Handles any delimiter  not just commas  although that is the default    Here s what I came up with     Public Function ToDataTable FileName As String  Optional Delimiter As String        As DataTable     ToDataTable   New DataTable     Using TextFieldParser As New Microsoft VisualBasic FileIO TextFieldParser FileName  With         HasFieldsEnclosedInQuotes   True   TextFieldType   Microsoft VisualBasic FileIO FieldType Delimited   TrimWhiteSpace   True        With TextFieldParser          SetDelimiters  Delimiter            ReadFields ToList Unique ForEach Sub x  ToDataTable Columns Add x           ToDataTable Columns Cast Of DataColumn  ToList ForEach Sub x  x AllowDBNull   True          Do Until  EndOfData           ToDataTable Rows Add  ReadFields Select Function x  Text BlankToNothing x   ToArray          Loop       End With     End Using   End Function   It depends on an extension method  Unique  to handle duplicate column names to be found as my answer in How to append unique numbers to a list of strings  And here s the BlankToNothing helper function     Public Function BlankToNothing ByVal Value As String  As Object      If String IsNullOrEmpty Value  Then Return Nothing     Return Value   End Function

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For those of you wishing not to use an external library  and prefer not to use OleDB  see the example below  Everything I found was either OleDB  external library  or simply splitting based on a comma  For my case OleDB was not working so I wanted something different   I found an article by MarkJ that referenced the Microsoft VisualBasic FileIO TextFieldParser method as seen here  The article is written in VB and doesn t return a datatable  so see my example below   public static DataTable LoadCSV string path  bool hasHeader                DataTable dt   new DataTable             using  var MyReader   new Microsoft VisualBasic FileIO TextFieldParser path                         MyReader TextFieldType   Microsoft VisualBasic FileIO FieldType Delimited              MyReader Delimiters   new String                         string   currentRow                  Loop through all of the fields in the file                   If any lines are corrupt  report an error and continue parsing                bool firstRow   true              while   MyReader EndOfData                                try                                       currentRow   MyReader ReadFields                           Add the header columns                     if  hasHeader  amp  amp  firstRow                                                foreach  string c in currentRow                                                        dt Columns Add c  typeof string                                                       firstRow   false                          continue                                               Create a new row                     DataRow dr   dt NewRow                        dt Rows Add dr                          Loop thru the current line and fill the data out                     for int c   0  c  lt  currentRow Count    c                                                  dr c    currentRow c                                                           catch  Microsoft VisualBasic FileIO MalformedLineException ex                                          Handle the exception here                                                    return dt

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I have been using OleDb provider  However  it has problems if you are reading in rows that have numeric values but you want them treated as text  However  you can get around that issue by creating a schema ini file  Here is my method I used      using System Data     using System Data OleDb     using System Globalization     using System IO   static DataTable GetDataTableFromCsv string path  bool isFirstRowHeader        string header   isFirstRowHeader    Yes     No        string pathOnly   Path GetDirectoryName path       string fileName   Path GetFileName path        string sql     SELECT   FROM      fileName             using OleDbConnection connection   new OleDbConnection                  Provider Microsoft Jet OLEDB 4 0 Data Source     pathOnly                    Extended Properties   Text HDR     header              using OleDbCommand command   new OleDbCommand sql  connection       using OleDbDataAdapter adapter   new OleDbDataAdapter command                 DataTable dataTable   new DataTable            dataTable Locale   CultureInfo CurrentCulture          adapter Fill dataTable           return dataTable

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public class Csv       public static DataTable DataSetGet string filename  string separatorChar  out List lt string gt  errors                errors   new List lt string gt             var table   new DataTable  StringLocalization            using  var sr   new StreamReader filename  Encoding Default                         string line              var i   0              while  sr Peek    gt   0                                try                                       line   sr ReadLine                        if  string IsNullOrEmpty line   continue                      var values   line Split new    separatorChar   StringSplitOptions None                       var row   table NewRow                        for  var colNum   0  colNum  lt  values Length  colNum                                                  var value   values colNum                           if  i    0                                                        table Columns Add value  typeof  String                                                      else                                                       row table Columns colNum     value                                                                      if  i    0  table Rows Add row                                     catch Exception ex                                        errors Add ex Message                                     i                                    return table

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Public Function ReadCsvFileToDataTable strFilePath As String  As DataTable     Dim dtCsv As DataTable   New DataTable       Dim Fulltext As String     Using sr As StreamReader   New StreamReader strFilePath          While Not sr EndOfStream             Fulltext   sr ReadToEnd   ToString               Dim rows As String     Fulltext Split vbLf              For i As Integer   0 To rows Count   - 1 - 1                 Dim rowValues As String     rows i  Split    c                  If True Then                     If i   0 Then                         For j As Integer   0 To rowValues Count   - 1                             dtCsv Columns Add rowValues j                           Next                     Else                         Dim dr As DataRow   dtCsv NewRow                           For k As Integer   0 To rowValues Count   - 1                             dr k    rowValues k  ToString                           Next                         dtCsv Rows Add dr                      End If                 End If             Next         End While     End Using     Return dtCsv End Function

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I came across this piece of code that uses Linq and regex to parse a CSV file  The refering article is now over a year and a half old  but have not come across a neater way to parse a CSV using Linq  and regex  than this  The caveat is the regex applied here is for comma delimited files  will detect commas inside quotes   and that it may not take well to headers  but there is a way to overcome these   Take a peak   Dim lines As String     System IO File ReadAllLines strCustomerFile  Dim pattern As String                                            Dim r As System Text RegularExpressions Regex   New System Text RegularExpressions Regex pattern  Dim custs   From line In lines               Let data   r Split line                    Select New With   custnmbr   data 0                                       custname   data 1   For Each cust In custs     strCUSTNMBR   Replace cust custnmbr  Chr 34           strCUSTNAME   Replace cust custname  Chr 34       Next

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private static DataTable LoadCsvData string refPath                var cfg   new Configuration     Delimiter        HasHeaderRecord   true            var result   new DataTable            using  var sr   new StreamReader refPath  Encoding UTF8  false  16384   2                         using  var rdr   new CsvReader sr  cfg               using  var dataRdr   new CsvDataReader rdr                                 result Load dataRdr                                   return result          using  https   joshclose github io CsvHelper

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Just sharing this extension methods  I hope that it can help someone   public static List lt string gt  ToCSV this DataSet ds  char separator              List lt string gt  lResult   new List lt string gt          foreach  DataTable dt in ds Tables                StringBuilder sb   new StringBuilder            IEnumerable lt string gt  columnNames   dt Columns Cast lt DataColumn gt                                               Select column   gt  column ColumnName           sb AppendLine string Join separator ToString    columnNames             foreach  DataRow row in dt Rows                        IEnumerable lt string gt  fields   row ItemArray Select field   gt                string Concat       field ToString   Replace                                    sb AppendLine string Join separator ToString    fields                       lResult Add sb ToString               return lResult     public static DataSet CSVtoDataSet this List lt string gt  collectionCSV  char separator              var ds   new DataSet         foreach  var csv in collectionCSV                var dt   new DataTable             var readHeader   false          foreach  var line in csv Split new     Environment NewLine    StringSplitOptions None                         if   readHeader                                foreach  var c in line Split separator                       dt Columns Add c                             else                               dt Rows Add line Split separator                                     ds Tables Add dt              return ds

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